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Emissivity estimation for high temperature radiation pyrometry on Ti–6Al–4V
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- Hagqvist, Petter, 1986- (author)
- Högskolan Väst,Avd för automation och datateknik,PTW
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- Sikström, Fredrik, 1971- (author)
- Högskolan Väst,Avd för elektro- och automationsteknik,PTW
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- Christiansson, Anna-Karin, 1947- (author)
- Högskolan Väst,Avd för elektro- och automationsteknik,PTW
- (creator_code:org_t)
- Elsevier BV, 2013
- 2013
- English.
- In: Measurement. - : Elsevier BV. - 0263-2241 .- 1873-412X. ; 46:2, s. 871-880
- Journal article (peer-reviewed)
Abstract
Subject headings
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- The paper demonstrates a versatile procedure suitable for industrial implementation of temperature measurement on a hot titanium alloy. The driving force has been the need for an accurate temperature measurement during additive manufacturing using laser welding technology where Ti–6Al–4V-wire is melted. The challenges consider both industrial constraints and the varying emissivity of the surface. Measurements makes use of a narrow bandwidth spot radiation pyrometer and a calibration procedure for estimation of the surface temperature through spectral emissivity estimation. The theoretical results are validated through experiments. A number of difficulties in radiation temperature measurements for metals with varying surface properties are discussed; especially the case of surface oxidation. The uncertainty in temperature reading due to the uncertainty in the emissivity estimate is established along with a model that qualitatively describes surface oxidation. The procedure is expected to be useful for several manufacturing applications where it is important to control high temperatures.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Annan teknik -- Övrig annan teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies -- Other Engineering and Technologies not elsewhere specified (hsv//eng)
Keyword
- Ti-6Al-4V; Temperature; Emissivity; Radiation pyrometer; Laser metal deposition; Calibration
- WIL
- Work-integrated Learning
- Physics
- Fysik
- Work Integrated Learning
- Arbetsintegrerat lärande
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- ref (subject category)
- art (subject category)
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